Although implantable cardioverter defibrillators offer the best protection against sudden cardiac death, catheter ablation for ventricular arrhythmias (VAs) can modify or prevent this event from occurring. In order to achieve a successful ablation, the correct identification of the underlying arrhythmogenic substrate is mandatory to tailor the pre-procedural planning of an ablative procedure as appropriately as possible. We propose that several of the imaging modalities currently used could be merged, including echocardiography (also intracardiac), cardiac magnetic resonance, cardiac computed tomography, nuclear techniques, and electroanatomic mapping. The aim of this state-of-the-art review is to present the value of each modality, that is, its benefits and limitations, in the assessment of arrhythmogenic substrate. Moreover, VAs can be also idiopathic, and in this paper we will underline the role of these techniques in facilitating the ablative procedure. Finally, a hands-on workflow for approaching such a VA and future perspectives will be presented.

Introduction The allostatic load (AL) is a framework for conceptualising the physiological multisystemic impact of prolonged exposure to stress and its related side effects on mental health. Stress due to AL can influence the development and outcomes of cardiovascular diseases. AL increases the risk of coronary and peripherical artery diseases. AL emerges from the detection of emotional dimensions related to the disease, low psychosocial functioning and high rates of psychopathological signs in patients with hypertension or coronary heart disease. Method and analysis The primary endpoint of the PLAY-UP protocol is the implementation of a multidimensional model underlying the clinical treatment of patients with cardiovascular disease through the integration of medical and psychological clinical variables. PLAY-UP is a cohort study that will last for 24 months. 200 participants will be recruited and divided into three groups: early disease, midterm disease and long disease. All patients will undergo a clinical evaluation based on the detection of biological, medical and psychological indicators and variables. The evaluation battery will comprise three types of measurements: medical, psychological and pharmacological treatments. Clinical and psychological measurements will be processed in an integrated manner through the combination of all variables examined, elaborating the Allostatic Load Index from a longitudinal time perspective. The Allostatic Load Index will be calculated by measuring the z-score. Ethics and dissemination Ethical Committee Approval was obtained from CEtRA Abruzzo Region (IT) (ID 0461499/23). The results of the present project will be published in peer-reviewed journals, disseminated electronically and in print, and presented as abstracts and/or personal communications during national and international conferences.

Purpose: Atrioesophageal fistula is one of the most feared complications of radiofrequency catheter ablation (RFCA) of atrial fibrillation (AF) as it is associated with high mortality. Determining the esophagus location during RFCA might reduce the risk of esophageal injury. The present study aims to evaluate the feasibility of using intracardiac echocardiography integrated into a 3-dimensional electroanatomical mapping system (ICE/3D EAM) for the assessment of esophageal position and shifts in response to ablation. Methods: We prospectively enrolled 20 patients that underwent RFCA of AF under conscious analgosedation. The virtual anatomy of the left atrium, the pulmonary vein (PV) ostia, and the esophagus was created with ICE/3D EAM. The esophageal positions were obtained at the beginning of the procedure and then after left and right PV isolation (PVI). Esophageal shifts were measured offline after the procedure using the tools available in the 3D EAM system. Results: Most esophagi moved away from the ablated PV ostia. After the left PVI, the median of the shifts was 2.8 mm (IQR 1.0–6.3). In 25% of patients, the esophagus shifted by >5.0 mm (max. 13.4 mm). After right PVI, the median of shifts was 2.0 mm (IQR 0.7–4.9). In 10% of patients, the esophageal shift was >5.0 mm (max. 7.8 mm). Conclusions: ICE/3D EAM enables the intraprocedural visualization of baseline esophageal position and its shifts after PVI. The shifts are variable, but they tend to be small and directed away from the ablation site. Repeated intraprocedural visualization of the esophagus may be needed to reduce the risk of esophageal injury.

Background: Convergent epicardial and endocardial catheter ablation had been used for the treatment of persistent atrial fibrillation (PeAF). Aims: The aims of this retrospective study are to describe the pattern of arrhythmias and substrate findings in patients previously submitted to convergent ablation and showing arrhythmic recurrences (AF/AT/AFL lasting at least 30 seconds) and documented with ILR during follow up. Methods: From a cohort of 119 patient who underwent convergent ablation, we selected the 55 with arrhythmic recurrences and showing AT/AF/AFL stored in ILR memories to submit them to remap procedure. Results: We excluded 1 patient who was submitted to ablate and pace without remapping and 1 patient whose data has been lost. Among 53 patients, 69.7% experienced AF (33.9% PAF and 35.8% PeAF), 5.6% typical AFL and 30.2% AT/atypical AFL. As for the substrates found, at detailed high-density mapping we had: 66.9% with veins reconnection (regardless the gaps localization), 37.7% with low-voltage area/abnormal signals on the posterior wall, 11.3% deserving CTI ablation for typical AFL and 28.3% with different LA substrates (septal, anterior, LAA, mitral annulus and 9.4% with gaps at superior surgical line). Notably, overlaps of arrhythmic patterns and substrate were also found in the same patients. Conclusion: In our study a total of 79.1% patients had substrates related to previous convergent ablation due to gaps at pulmonary veins or superior line. The rest had an arrhythmic substrate in areas not previously ablated like posterior wall or CTI. These findings suggest that a large amount of patients submitted to convergent ablation (up to 80%) may have an arrhythmic substrate and thus potentially recurrences due to previous epi-endocardial ablation.